Compare and contrast isotonic, hypotonic, and hypertonic solutions. What happens when a normal animal cell finds itself in any of the three kinds of solutions?
What will be an ideal response?
Osmotic pressure forms in a cell when there is a difference in solute concentrations on either side of the membrane. There are three possible solutions within a cell. Isotonic solutions have equal osmotic pressure on both sides of a membrane, so there is no net movement of water across the membrane. A hypotonic solution has less osmotic pressure, or more water, than the solution across the membrane. A hypertonic solution has a greater osmotic pressure (less water). Cells in hypertonic solutions lose water, whereas cells in hypotonic solutions gain water.
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Fitness is a measure of reproductive success. If an individual with genotype BB produces 6 offspring, and a heterozygous individual (Bb) produces 10 offspring, and a third individual with genotype bb produces 5 offspring, what is the fitness value for the individual with BB genotype?
A. 1.0. B. 0.5. C. 0.6. D. 0.4. E. 1.1
Which of the following bacteria have an innate resistance to penicillin?
A. S. aureus B. S. epidermidis C. M. luteus D. Mycoplasma
In polymerase chain reaction technology, the two strands of DNA are separated by:
a. gel electrophoresis. b. treatment with restriction enzymes. c. centrifugation. d. exposure to high pH. e. exposure to heat.
In the correct order, what are the names of the fluid leaving the capillaries, going into the space between cells and then into the lymphatic capillaries?
A) lymph, plasma, and interstitial fluid B) lymph, interstitial fluid, and plasma C) interstitial fluid, lymph, and plasma D) plasma, interstitial fluid, and lymph E) plasma, lymph, and interstitial fluid